Three-dimensional oriented attachment growth of single-crystal pre-perovskite PbTiO3 hollowed fibers
Type
ArticleKAUST Department
Advanced Membranes and Porous Materials Research CenterBiological and Environmental Sciences and Engineering (BESE) Division
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Date
2018Permanent link to this record
http://hdl.handle.net/10754/627283
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Hollowed single-crystal pre-perovskite PbTiO fibers (PP-PTF) were successfully synthesized via a polyvinyl alcohol (PVA) assisted hydrothermal process. The as-prepared PP-PTF were characterized to be 0.3-1 μm in diameter and tens of micrometers in length by adjusting the concentration of PVA to 0.8 g L. Microstructure characterization of the samples at different reaction times revealed that PP-PTF were formed via a three-dimensional (3D) hierarchical oriented attachment (OA) growth process. The initial growth units were determined to be single-crystal pre-perovskite PbTiO fibers with a diameter of 10-20 nm. Zeta potential measurement suggested that the main driving force of the OA process is the surface electrostatic force, which is induced by the incompletely bonded Pb and O atomic layers on the surface of the {110} plane. Moreover, molecular dynamics simulations have been employed to reveal a stable configuration of the initial pre-perovskite PbTiO growth units, agreeing well with the experimental results.Citation
Zhao R, Li M, Ren Z, Zhu Y, Han G (2018) Three-dimensional oriented attachment growth of single-crystal pre-perovskite PbTiO3 hollowed fibers. CrystEngComm 20: 448–453. Available: http://dx.doi.org/10.1039/c7ce01780d.Sponsors
This work was financially supported by the National Natural Science Foundation of China (No. 51232006 and 51472218) and the Fundamental Research Funds for the Central Universities (No. 2017FZA4008).Publisher
Royal Society of Chemistry (RSC)Journal
CrystEngCommae974a485f413a2113503eed53cd6c53
10.1039/c7ce01780d